lummert
Active member
- Joined
- Jan 11, 2008
- Location
- Portland IN
Been noticing difficulty keeping my 88 765 Turbo Intercooler Wagon in overdrive under the speed of 58 mph. If there's no wind the car runs good unless there's a slight incline. Below 58 mph or a slight incline trans shifts out of overdrive.
I had previously installed a 90+ manifold and TD04-13C. This turbo failed and I had to reinstall the original -89 manifold and TD05-12b. The wastegate actuator had gotten lost so I modified the actuator from the TD04-13C to fit. My tests indicate that the boost is set at about 4.5 psi at most, but closer to 2 psi when getting on it when passing another vehicle.
My thinking is that there's just not enough boost pressure before reaching about 2500 rpm. Running 215/60R-15 tires all around. Odometer is 2.7% slow. Speedometer is right on.
My plan is to try adjusting the wastegate actuator rod for more boost (perhaps closer to 7.5 psi). Any other wastegate actuators that would be a better fit on a TD05-12b?
I had previously installed a 90+ manifold and TD04-13C. This turbo failed and I had to reinstall the original -89 manifold and TD05-12b. The wastegate actuator had gotten lost so I modified the actuator from the TD04-13C to fit. My tests indicate that the boost is set at about 4.5 psi at most, but closer to 2 psi when getting on it when passing another vehicle.
My thinking is that there's just not enough boost pressure before reaching about 2500 rpm. Running 215/60R-15 tires all around. Odometer is 2.7% slow. Speedometer is right on.
My plan is to try adjusting the wastegate actuator rod for more boost (perhaps closer to 7.5 psi). Any other wastegate actuators that would be a better fit on a TD05-12b?